HELP - Hibernate vs Toplink!!!

Question

Hello Everybody,
I have some questions related with Hibernate vs Toplink.
1- To obtain that driver JDBC it gives back the amount of rows affected in each one of updates of a lot that is executed in batch. Hibernate to implement the optimistic lock, adds to each consultation a "WHERE >" where it compares the VERSION of the object in memory with the field VERSION of tuple corresponding in the DB. If it detected that rows were updated "0" it interprets that another user modified that object before and shoots an exception of Concurrence. When batch is used to execute a lot of consultations, driver gives back a vector like result. Each position of this vector this destining to indicate the amount of updates that they became in each consultation of the lot. The problem is that when using PreparedStatement (that is what Hibernate uses to execute the queries) the vector gives back to "-2" in all positions without concerning the real amount that were affected. The affected fact that driver it gives back to "-2" and not real amount
it for a consultation causes that Hibernate cannot determine if were or not a concurrence problem. We cannot modify Hibernate so that it knows to interpret the "-2" given back by driver because it would not be sufficient to determine if the version were or not modified. The safe SOLUTION to this problem would be that driver it gives back to Hibernate the affected real amount to him in each one of the positions. This is what Hibernate hopes. We can see the execution batch that implements Hibernate in org.hibernate.jdbc.AbstractBatcher>>executeBatch of the
distribution of Hibernate. Could be solve this problem with Toplink?
2-Security by dominion. How we would take label security with Hibernate? I know it is possible much better with Toplink but what about Hibernate.
3-Multiple mappings with Hibernate. Hibenate makes alternative mappings and for this reason it raises more of the necessary thing affecting the performance. Although with them we solved several problems of performance turn out uncomfortable to maintain to them. How we can improve it. Could be solve this problem with Toplink?
Best Regards,
Seba.

Answer 1

1- This issue is down in the driver, and we have seen it before. We have worked with the driver team to come up with a solution in the 10.1.3.1 release. The client would use the Oracle9Platform and call this method session.getLogin().getPlatform().setUsesNativeBatchWriting(true); This will cause TopLink to call special API on the Oracle Drivers to do what is expected of locking and batching together.
2- I assume that you are referring to OLS and VPD. TopLink supports this, but we will need more information to help you further.
3- Not sure what you mean here... In TopLink you can map multiple mappings to the same entity. is that what you are referring to?